Renesas HD64F3664HV

Overview

HD64F3664HV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/300H Tiny Series, featuring an H8/300H CPU core with H8/300 instruction set compatibility, 64 KB on-chip ROM, 4 KB RAM, and integrated peripherals including UART, timer/counters, and I/O ports. It operates at up to 20 MHz and targets embedded control in industrial equipment and consumer appliances.

For engineers reviewing the HD64F3664HV datasheet, HD64F3664HV pinout, HD64F3664HV application, or HD64F3664HV equivalent, key selection considerations include its 100-pin PQFP package, 5 V operation, on-chip flash programming capability, and support for low-power sleep/standby modes in resource-constrained systems.

Technical Context

The HD64F3664HV implements the H8/300H CPU architecture with 24-bit addressing, supporting both byte- and word-aligned memory access. Its system clock generator accepts external crystal (up to 20 MHz), ceramic resonator, or external clock input, and includes subclock circuitry for 32.768 kHz real-time clock support.

Peripheral integration includes two asynchronous serial interfaces (UART), three 16-bit timer/counters with capture/compare functionality, a watchdog timer, and 80 general-purpose I/O pins configurable as inputs, outputs, or peripheral functions. Power management features include Sleep, Standby, Subsleep, and Subactive modes controlled via SYSCR1/SYSCR2 registers.

Key Specifications

Pinout & Package

HD64F3664HV is housed in a 100-pin PQFP (Plastic Quad Flat Package) with 0.65 mm lead pitch, designed for reflow soldering and high-density PCB layouts. Pin numbering follows standard counter-clockwise convention starting from the index mark.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with HD64F3664HV, HD64F3664F offers identical functionality at lower cost but reduced voltage margin and ruggedness, while HD64N3664 trades flash flexibility for mask-ROM density and unit cost-making HD64F3664HV optimal for prototyping and mid-volume upgradable systems.

Availability

HD64F3664HV is available at Aetrix Electronics and suitable for industrial motor control, home appliance MCU, point-of-sale terminal, and building automation sensor node applications requiring stable component supply and long-term lifecycle support.

Supply support for HD64F3664HV includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The H8/3664 Group-including HD64F3664HV-is designed for cost-effective, low-power embedded control in consumer and industrial equipment where flash programmability and peripheral integration reduce BOM count.

FAQ

What is the maximum operating frequency of the HD64F3664HV?

The HD64F3664HV supports a maximum system clock frequency of 20 MHz when using an external crystal or clock source. This frequency enables approximately 10 million instructions per second (MIPS) throughput, sufficient for real-time control tasks such as motor commutation and sensor data processing. The HD64F3664HV's internal clock generator includes prescalers and subclock circuitry to derive lower-frequency clocks for peripherals without external components.

Does the HD64F3664HV support in-system programming of its on-chip flash memory?

Yes, the HD64F3664HV supports in-system programming (ISP) of its 64 KB on-chip flash memory via its built-in boot mode and on-board programming interface. Programming can be performed using standard UART signals and a host PC, eliminating the need for external programmers during development or field updates. The HD64F3664HV's FLMCR1 and FENR registers control erase and write operations, with hardware protection against accidental writes.

What power-saving modes are available on the HD64F3664HV?

The HD64F3664HV provides four distinct low-power modes: Sleep, Standby, Subsleep, and Subactive. In Standby mode, current consumption drops to ≤10 µA while retaining RAM contents and allowing wake-up via external interrupt or RTC alarm. Subsleep mode reduces current further by stopping the main clock while keeping the subclock active for timekeeping. These modes are controlled through SYSCR1 and SYSCR2 registers and are essential for battery-powered HD64F3664HV applications.

Is the HD64F3664HV pin-compatible with other members of the H8/3664 Group?

Yes, the HD64F3664HV is pin-compatible with other 100-pin variants in the H8/3664 Group, including HD64F3664F and HD64N3664. All share identical pin assignments, electrical characteristics, and register maps, enabling drop-in replacement across flash-based and mask-ROM versions. However, the HV suffix denotes enhanced voltage tolerance (3.0–5.5 V operation) and improved industrial-grade ESD/latch-up immunity not present in non-HV variants.

What development tools are supported for the HD64F3664HV?

The HD64F3664HV is supported by Renesas' High-performance Embedded Workshop (HEW) IDE, C/C++ compiler (REJ10B0058), and simulator/debugger (REJ10B0211). Hardware debugging uses the E7 or E8 in-circuit emulators, though certain pins (NMI, P85–P87) are reserved during emulation. The HD64F3664HV also supports UART-based bootloader programming, enabling rapid firmware iteration without dedicated debug hardware.